4. Meredith and Molly go shopping. Meredith buys a shirt for $10 and two pairs of pants for $10 each. She has $15 left over. Molly buys a dress for $50 and two packs of cards. If Molly started with $20 more than Meredith, and if Molly spent all her money, how much does one pack of cards cost?

$15

$7.50

$6.50

$2.50

5. Tobin rows
2
miles per hour faster than her opponent. If it takes Tobin
30
minutes to finish a race, and it takes her opponent
45
minutes to finish the same race, how fast does Tobin row?

4
mph

5
mph

6
mph

30
mph

6. Greg receives the following scores on his math tests:
{90, 83, 78, 95}
. What is the minimum score he needs on the last math test in order to get an
85
average in the class?